JPS58102701U

JPS58102701U - Boiler feed water pump drive turbine backup steam pressure control device

Info

Publication number: JPS58102701U
Application number: JP32982U
Authority: JP
Inventors: 明石　貞一郎
Original assignee: 株式会社東芝
Priority date: 1982-01-07
Filing date: 1982-01-07
Publication date: 1983-07-13

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１−は従来のＢＦＰ−Ｔバックアップ蒸気圧力制御装
置の一実施例を示すブロック図、第２図は、本考案の一
実施例を示すブロック図、第３図は、第２図の切替演算
器の詳細を示すブロック図、第４図は、切替演算器の作
用を説明するためのグラフ、第５図は、本考案の他の実
施例を示すブロック図である。１・・・・・・ボイラ給水ポンプ、２・・曲ボイラ給水
ポンプ駆動タービン、３・・・・・・抽気管、４・・・
・・・抽気逆止弁、７・・・・・・補助蒸気管、９・・
・・・・圧力調整弁、１１・・・・・・圧力検出器、１
４・・・・・・圧力制御装置、１６・・・・・・切替演
算器。Fig. 1- is a block diagram showing an embodiment of a conventional BFP-T backup steam pressure control device, Fig. 2 is a block diagram showing an embodiment of the present invention, and Fig. 3 is a switching operation of Fig. 2. FIG. 4 is a graph for explaining the operation of the switching arithmetic unit, and FIG. 5 is a block diagram showing another embodiment of the present invention. 1... Boiler feed water pump, 2... Bent boiler feed water pump drive turbine, 3... Air extraction pipe, 4...
... Bleed check valve, 7... Auxiliary steam pipe, 9...
...Pressure regulating valve, 11...Pressure detector, 1
4...Pressure control device, 16...Switching calculator.

Claims

[Scope of utility model registration request]

A bleed pipe having a bleed check valve inserted therein which supplies oil vapor from the main turbine to the boiler feed water pump driving turbine, and a bleed pipe branched from the downstream of the bleed check valve to drive the boiler feed water pump. an auxiliary steam pipe into which a pressure regulating valve for supplying auxiliary steam to the turbine is inserted, two pressure detectors disposed downstream of the pressure regulating valve of the auxiliary steam pipe, and outputting a pressure setting value a in a normal state; A switching calculator that outputs a pressure set value when the load of the plant falls below a certain value, and a pressure setting value from this switching calculator and a pressure value from the pressure detector are input, and the system is operated based on these values. 1. A backup steam pressure control device for a boiler feedwater pump drive turbine, comprising: a pressure control device for controlling the opening degree of the pressure regulating valve.